Can't open Pages files from iPad in Word 2010 on PC

I have not been able to open any files created on my iPad (iOS 6.0.1) with Apple Pages in Microsoft Word 2010 on Windows XP Pro and hope someone can suggest a solution.

I am emailing the files as attachments (.docx files) When I try to open the file on my PC, I get an error message when I open them in Word that says:

Word was unable to read this docuemnt.

Try one or more of the following:

* Open and repair the file.

* Open the file with the Text Recovery converter. (C:\Users\...\name of file.doc)

In addition, I tried to open the .docx file in Openoffice.org 3.4.1 and it got a read error.

Any suggestions? Is there any kind of plug-in/add-in for MS Word 2010 that would correct the problem?

Thanks,

Rich

Additional: Pages was purchased today from the App store; iPad is Gen4 a couple days old